This form occurs in just a few technical English words, of which the most common are prosopagnosia (Greek agnōsia, ignorance), an inability to recognize the faces of familiar people, typically as a result of damage to the brain; prosopography (Greek -graphia, writing), sometimes a description of a person's appearance, personality, social and family connections, but more commonly the study of careers and family connections, especially in Roman history; and prosopopoeia (Greek poiein, to make), a figure of speech in which either an abstract thing is personified, or an imagined or absent person or thing is represented as speaking.